class CPU {
   int speed; 
   int getSpeed() {
      return speed;
   }
   public void setSpeed(int speed) {
      this.speed = speed;
   }
}
class HardDisk {
   int amount; 
   int getAmount() {
      return amount;
   }
   public void setAmount(int amount) {
      this.amount = amount;
   }
}
class PC {
    CPU cpu;
    HardDisk HD;
    void setCPU(CPU cpu) {
        this.cpu = cpu;
    }
     void setHardDisk(HardDisk HD) {
        this.HD = HD;
    }
    void show(){
       System.out.println("CPU速度:"+cpu.getSpeed());
       System.out.println("硬盘容量:"+HD.getAmount());
    }
}
public class Test {
   public static void main(String args[]) {
       CPU cpu = new CPU();
       HardDisk HD=new HardDisk();
       cpu.setSpeed(2200);
       HD.setAmount(200);
       PC pc =new PC();
 }
